<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<form action="" method="post" enctype="multipart/form-data">
    <input type="file" name="img" id="img"/>
    <input type="hidden" name="action" value="upload">
    <input type="submit" value="提交"/>
</form>
</body>
</html>